Improvement in lifting-jacks



Allniit iitni We eine,

onnnN A. ANTHONYQOF 'Martin-LD, NEW YORK.'

Letters Patent No. 110,818,.dated January 10,1871.'

IMPROVEMENT-1N merma-Mone The Schedule xeferred to in these Letters Patentand making pai-t o the same.

My invention relates to portable lifting-jacks, and" consists in a simple and eiiicient combination of parts, which render it very portable and yet adapted lto the elevation of considerable weight-s.

Figure 1 is a front; and

Figure 2, a vertical section through the middle thereof.

A is a post slotted through the middle fronrthe ltop downwardly.

C is a sin'ooth bearing piece on.one.side of the top.

E is a fixed detent-pawl, having aruis loosely pivoted on the post and near the top.

G is a lever, fulerumed on the post by means of forked ends, and provided-with a loose pawl, F, on its end.

L is a link; and Y M, another lever pivoted to the post.

I is an independent unattached bar, having inclined teeth thereon, and a hook, K, or some lother means, to receive the weight at the end.

The bar I placed obliquely through the -slot of the post, resting at one point on the fnlernin-pin of lever G, and at another point above and against the 'smooth-suriced piece C. It is prevented from dropping through from its own gravity bythe detentpawl When ready, the power-end of lever G is elevated, which carries its swinging pawl F down, and when the said power-end is depressed the pawl catches on the inclined teeth of the bar and eleva-tes it. rhe deteni,` pawl holds the bar at the point to which it has been 'raised until a new lift has been made.

Ihe weight is thns'm'ade to attain th'e desired position. In ease of using a high post the'. lever M may be also employed. v

Having thus described all that is necessary to a full understanding of my invention,

What I esteem to be new, and desire to protect by Letters Patent, is

The slotted post A having loose pawl E and topvpiece C thereon, and the pivoted pawled lever G H E, combiued'as described,witb the unattache'd notchedy -bar I, as and for the purpose specified.

ORREN A ANTHONY.

Vitnesses:

E. A. EnPHnn, H. TITCOMB. 

